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LeasideLock ExpertsOpen 24/7 (289) 806-8979
Person holding two lock cylinders beside an open painted door, with loose hardware and debris on the sill. — Seized & Jammed Lock Opening, Leaside

Lockouts · Leaside

Seized & Jammed Lock Opening

The lock works, but only if you lean on the door with your hip while turning the key. After a week of humid weather the bolt is jammed against the strike plate, and without that push the key stops halfway.

In plain words

Many jammed locks are not lock problems at all. Wood doors swell in humid weather and shrink in dry winter air, hinges loosen and let the door drop, and a strike plate that was fine in spring is a few millimetres out by autumn. When that happens the bolt is squeezed in its pocket and the key cannot move it. The locksmith checks this first by loading the door in different directions while working the key, and by comparing how the lock behaves with the door open. If the door is the cause, the opening is gentle and the lasting fix is a hinge, strike or seal adjustment.

Sound familiar?Leaside

The call
The old mortise lock on the front door of the house turns the key halfway and stops with a dull clunk. It has been getting harder for months, and the brass key is starting to show a bend.

NextHow the visit goes

Seized & Jammed Lock Opening · Leaside

How the visit goes

Technician in a cap using a yellow drill at the round bore of a dark door, with a black knob below it. — Leaside
  1. Scene 1

    Levers, thumb-turns and mortise cases

    Lever handles and mortise locks add parts that a plain deadbolt does not have, and each can jam on its own. A lever that drops without retracting the latch can have a tired return spring or a worn hub inside the case, though latch engagement, linkage, or the spindle can produce the same symptom. A thumb-turn that will not move can be a bent spindle, a stripped drive or a bolt pinned by the frame. On older houses and commercial doors the mortise case itself may be packed with decades of dust and dried grease. The locksmith works the lever, key and thumb-turn separately and feels where resistance starts, which locates the fault before the case is opened.

  2. Scene 2

    Stripping and rebuilding the cylinder on the bench

    With access restored, a cylinder that seized gets a proper service. The locksmith removes it from the door, slides the plug out with a follower so the top pins and springs stay put, and lays out the pin stacks. Everything is cleaned, worn bottom pins and tired springs are replaced, and any burr on the plug is dressed. The plug is reassembled to the same combination so your existing keys keep working, then lubricated with the product that cylinder's maker specifies and cycled until it turns with a fingertip. If the key that jammed was worn, a fresh one is cut from the code rather than from that key.

  3. Scene 3

    A door that closes without a fight

    If the door was the cause, the hinges, strike and seal have been set so the bolt has room. Keeping it that way is a seasonal habit: each spring and fall, try the lock with the door closed and no pressure on it, and snug the hinge and strike screws if the door has begun to drop. Wood keeps moving with humidity, so a door that swells in August may need a touch on the strike in September. A door that suddenly needs a push to lock is telling you early, while the fix is still a screwdriver and not a seized bolt.

In the van

  • Strike plate and hinge shims
  • Dry PTFE or graphite lock lubricant
  • Penetrating lubricant
  • Plug follower and repinning kit
  • Replacement cylinder

What shapes the quoteLeaside Lock Experts

Small parts behind the cylinder
Tailpieces, cams, springs, cylinder caps and pins are minor items, but each one used is named on the quote so you can see what went into the lock.
Ice and salt on the day
A cylinder frozen solid or crusted with salt needs thawing, flushing and drying before it can even be diagnosed, and a winter call is quoted with that time in mind.
The drive to you
Driving time is part of every call, and a property at the end of a long rural road is a different trip from one a few streets over.

FeesSame any hour

Have it ready

Before you call · 0 / 3

(289) 806-8979

Ask us anything about locks

My key turns all the way round but the bolt stays put. What has broken?

The key and cylinder are doing their job; the bar behind the cylinder that drives the bolt, called the tailpiece or cam, has broken, slipped or twisted out of engagement. It is a small part. The locksmith retracts the bolt through the mechanism or removes the cylinder to reach it, then fits a tailpiece of the right length and profile. Your cylinder and keys are unchanged afterwards.

Can an old mortise lock in a century home be serviced rather than replaced?

Often, and keeping the original hardware is usually worth trying first, since it fits the door and suits the house, though condition and the availability of matching parts decide whether a repair is realistic. The case comes out of the door edge, the decades of dust and hardened grease are cleaned away, a broken spring or worn hub is replaced with a matching part, and the contact surfaces get fresh grease. If a bit key or a cylinder has worn, a new key is cut or the cylinder rebuilt.

Why do locks jam more in winter?

Two reasons meet in the same season. Freeze-thaw weather sends meltwater into the keyway by day and freezes it by night, and cold thickens any old grease or oil that has been sprayed into the pins. At the same time dry, heated indoor air shrinks wood doors so bolts move in their pockets. Doors on the shaded or windward side get the worst of it. A dry lubricant, a keyhole cover and a check of the strike after the first hard frost take care of most of it.

Leasideinformation

TorontoOntario

Town
Leaside, Toronto
In business
34 years
Hours
Open 24/7
Nights, weekends and holidays, same fees
Visits
On-site assessment preferred. Request a visit or call.

2021 census: what it means at the door

Every square is one home in a hundred.

  • 58 in 100 homes · older homes
  • About 58% of homes in Toronto were built in 1980 or earlier, according to the 2021 Census.Older homes tend to have had many hands on their doors: owners, tenants, tradespeople, family. A locksmith visiting such a house pays attention to who holds keys now, and rekeying or a keyed-alike set often matters more than any new hardware.
  • Single-detached houses make up about 23% of homes in Toronto (2021 Census).Shared entrances mean fobs, intercoms and buzzers alongside conventional locks. A locksmith can service the mechanical side of those doors and advise on how the fob system and the cylinder work together when management asks.

Source: Statistics Canada, Census Profile

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On-site assessment

Request a visit.

The lock works, but only if you lean on the door with your hip while turning the key.

(289) 806-8979, open 24/7.